In the United States we have a judicial concept called a "contract of adhesion". For a contract to be treated as a contract of adhesion, it must be presented on a standard form on a "take it or leave it" basis, and give one party no ability to negotiate because of their unequal bargaining position. The court will treat any terms outside of the reasonable expectations of the person who did not write the contract as invalid, and any ambiguous terms will be interpreted in their favor also.